duplicate column during pivot table - sql

Question

I have a table like
select * from myTable
ID Type Prop1 Prop2 Prop3 Prop4 Prop5
-- ------ ------- ------- ------- ------- -------
1 Hot 10 9 23 32 4
1 Cold 2 24 53 34 5
2 Hot 11 9 23 32 4
2 Cold 22 1 53 30 11
I want to pivot my table like that
select * from myPivotTable
ID HotProp1 HotProp2 HotProp3 HotProp4 HotProp5 ColdProp1 ColdProp2 ColdProp3 ColdProp4 ColdProp5
-- ------- ------- ------- ------- -------- --------- --------- --------- --------- ---------
1 10 9 23 32 4 2 24 53 34 5
2 11 9 23 32 4 22 1 53 30 11
How can I convert myTable to myPivotTable using pivot function in oracle sql?

Answer 1

I think conditional aggregation is a much simpler query than a complex pivot:
select id,
sum(case when type = 'Hot' then Prop1 end) as Hot_Prop1,
sum(case when type = 'Hot' then Prop2 end) as Hot_Prop2,
sum(case when type = 'Hot' then Prop3 end) as Hot_Prop3,
sum(case when type = 'Hot' then Prop4 end) as Hot_Prop4,
sum(case when type = 'Hot' then Prop5 end) as Hot_Prop5,
sum(case when type = 'Cold' then Prop1 end) as Cold_Prop1,
sum(case when type = 'Cold' then Prop2 end) as Cold_Prop2,
sum(case when type = 'Cold' then Prop3 end) as Cold_Prop3,
sum(case when type = 'Cold' then Prop4 end) as Cold_Prop4,
sum(case when type = 'Cold' then Prop5 end) as Cold_Prop5
from myPivotTable
group by id;

Answer 2

If your Oracle version 11g and up you can simply "re-pivot" it(You have already pivoted data) - unpivot it first and then pivot again:
with t1(id1, type1, Prop1, Prop2, Prop3, Prop4, Prop5) as(
select 1, 'Hot' , 10 , 9 , 23,32 , 4 from dual union all
select 1, 'Cold', 2 , 24, 53,34 , 5 from dual union all
select 2, 'Hot' , 11 , 9 , 23,32 , 4 from dual union all
select 2, 'Cold', 22 , 1 , 53,30 , 11 from dual
)
select *
from( select *
from t1
unpivot (
val for col in (prop1, prop2, prop3, prop4, prop5)
)
)
pivot(
max(val) for (col, type1) in (('PROP1', 'Hot') as HotProp1,
('PROP2', 'Hot') as HotProp2,
('PROP3', 'Hot') as HotProp3,
('PROP4', 'Hot') as HotProp4,
('PROP5', 'Hot') as HotProp5,
('PROP1', 'Cold') as ColdProp1,
('PROP2', 'Cold') as ColdProp2,
('PROP3', 'Cold') as ColdProp3,
('PROP4', 'Cold') as ColdProp4,
('PROP5', 'Cold') as ColdProp5)
)
Result:
ID1 HOTPROP1 HOTPROP2 HOTPROP3 HOTPROP4 HOTPROP5 COLDPROP1 COLDPROP2 COLDPROP3 COLDPROP4 COLDPROP5
---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------- ----------
1 10 9 23 32 4 2 24 53 34 5
2 11 9 23 32 4 22 1 53 30 11
Here is the demo